According to question, they are using Visualization strategy .
To create a mental picture that corresponds to the story or informational article they are reading, students must use a combination of their own prior knowledge, textual evidence, and creativity. The images they conjure enable them to comprehend what they are reading more thoroughly.
Making up mental pictures based on narrative events is referred to as "visualizing" for understanding. In order to deeply understand the text and focus on long-term memory, reading comprehension depends on the reader's capacity to visualize the text as if they were watching a movie.
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